Marine Technology Reporter Blogs - intervention

When Subsea 7 and SeeByte collaborated in engineering the AIV, the world’s first purpose built Autonomous Inspection Vehicle, they were looking for a new cost-effective asset for inspecting LoF (Life of Field) projects. The AIVs software was designed to dynamically control this unique hover-capable vehicle, which is already being used in Subsea 7 LoF projects for general visual inspection. It can also be used as an aid to field survey, integrity management and developments continue, looking at expanding its use to light intervention activities. One of the advantages of the AIV over other AUV’s is its capability to hover, maintaining station when necessary. It also has the ability to operate directly from a host facility such as an FPSO or rig as well as from infield support vessels.

Well stimulation is a well intervention performed on an O & G well to increase production by improving the flow of hydrocarbons from the drainage area into the well bore. The assortment of drilling fluid pumped down the well during drilling and completion can often cause damage to the surrounding formation by entering the reservoir rock and blocking the pore throats (the channels in the rock throughout which the reservoir fluids flow). Similarly, the act of perforating can have a similar effect by jetting debris into the perforation channels. Both these situations reduce the permeability in the near well bore area and so reduce the flow of fluids into the well bore. A simple and safe solution is to pump diluted acid mixtures from surface into the well to dissolve the offending material.

Riserless Light Well Intervention (RLWI) enables operators to increase the oil and gas recovery rate from subsea oil wells. It allows rapid well access by using smaller DP vessels instead of larger semisub drilling rigs or drillships. RLWI also enables subsea well intervention without having to use a drilling riser package connected to the subsea stack, which is topped by the blowout preventer system. Riserless intervention is a cost-saving alternative to drilling rigs, reducing mobilization time for life-of-well operations including wireline, logging, light perforating, zone isolation, plug setting and removal, and decommissioning. The technology is based on wireline well maintenance, where the cable is routed via a subsea lubricator system into the subsea well.

Marseille-based Cybernetix is a major European provider of remotely operated or robotic systems for intervention in subsea systems, operating in 15 countries. The company launched its Brazilian subsidiary in December 2010, located in Rio de Janeiro. CYBERNETIX Produtos e Servicos Ltda. "CYBERNETIX do Brasil" was born to compete for subsea contracts in Brazil, specifically aiming at services for the deepwater subsea pre-salt plays being discovered and also for those plays going through EWTs or already in first phases of production, as some pre-salt plays already are. Structural integrity monitoring for offshore units along with robotics equipments for inspection…

The SUT Technical Conference 2010 will be held in Rio de Janeiro and promises to be the main subsea event of the year in Brazil.The Society for Underwater Technology (SUT) is a multi-disciplinary learned society that brings together organisations and individuals with a common interest in underwater technology, ocean science and offshore engineering. SUT was founded in 1966 and has members from more than 40 countries, including engineers, scientists, other professionals and students working in these areas. Cross-fertilisation and dissemination of ideas, experience and information between workers in academic research, applied research and technology, industry and government. Development of techniques and tools to explore, study and exploit the oceans.